WUXI GREMET MACHINERY CO., LTD. |
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platinum, palladium and rhodium recovery and refining production
Introduction of platinum, palladium and rhodium recovery and
refining production line of automobile exhaust catalyst
Due to the lack of domestic platinum group mineral resources and
the imbalance between supply and demand, in order to meet domestic
demand, most of China's platinum group metals come from the
recovery of platinum group metal containing waste, such as platinum
palladium catalyst in petrochemical industry, automobile exhaust
catalyst, etc. Different raw materials require different treatment
processes. The company designs processes and equipment according to
different raw materials to meet production needs.
Features of platinum, palladium and rhodium recovery and refining
production line:
The company's platinum, palladium and rhodium recovery and refining
production line can be designed according to the owner's raw
materials and operation habits. It can refine and separate
platinum, palladium and rhodium materials with a content of more
than 5%, and the content of each finished product can reach more
than 99.95%.
High recovery of platinum, palladium and rhodium
In the recovery process of platinum palladium rhodium waste
catalyst, some processes oxidize a small number of palladium to
form palladium oxide which is difficult to dissolve in acid and
alkali. The dissolution rate is very low when directly using aqua
regia or chlorination. In addition, the stability and extremely
difficult solubility of rhodium iridium ruthenium also lead to the
low recovery rate of rhodium iridium ruthenium. We design a
pretreatment process for this material, which can effectively
improve its dissolution rate and then improve the recovery rate of
precious metals.
Continuous operation of production line
The company's platinum, palladium and rhodium recovery production
line has the following advantages: first, design glass high-level
tanks, reduce staff handling and increase production capacity. The
traditional PP high-level tank is not suitable for cleaning, which
is easy to be dirty and inconvenient to observe the liquid level,
resulting in unqualified product quality and large production
occupation; The designed glass high-level storage tank well meets
the requirements of production. The glass material is transparent
and easy to clean. 2, In order to facilitate the use and operation
of the supporting glass high-level tank, the design of the
traditional suction filter bottle is improved and changed to a
horizontal filter. After the filtration of the horizontal filter is
completed, the liquid guide pipe is connected below and directly
enters the glass high-level tank. The horizontal filter has a
slight 3O inclination angle to facilitate the vacuum extraction of
a small amount of solution. This makes the production process more
coherent and smooth, and the production capacity doubled.
Reasonable exhaust design
The traditional refining of platinum, palladium and rhodium is
carried out in the wind cabinet. The exhaust pipe of the wind
cabinet is normally open. The overall design air volume design
requirements are large. Excessive air pressure leads to the
volatilization of precious metals with steam, and the loss rate of
precious metals is high. The complete set of platinum, palladium
and rhodium refining air cupboard is sealed at the mouth of the
reaction vessel, and a gas-liquid separation and condensation
device is added in the non temperature reaction vessel to condense
water vapor, so that the waste gas can directly enter the
corresponding treatment pipeline. For example, in the aqua regia
dissolution process, the flue gas hood seals the reaction vessel.
After the waste gas produced by the reaction is condensed and
separated by gas-liquid, the condensate containing precious metals
returns to the reaction vessel. The nitrogen oxide waste gas
directly enters the jet tower for treatment, so as to reduce the
diffusion of waste gas and maintain a good workshop environment.
In the production and refining process, from aqua regia to finished
products, all precious metal filters and storage tanks are made of
glass, transparent and visible. A spray washing system is attached
to reduce the occupation of precious metals in the equipment.
Mature waste gas treatment process
The company is equipped with mature precious metal refining waste
gas treatment process and multi-stage jet jet high concentration
NOx waste gas treatment device, including gas-liquid separator, no
oxidation tank, jet jet jet tower, etc. for the high concentration
NOx flue gas (~ 30000 mg / m3) produced by the dissolution of
platinum, palladium and rhodium, the emission concentration is less
than 100 mg / m3 and the minimum can be less than 20 mg / m3.